This trophy is obtained in the operation "Die Another Day", in the mission "Ice Hotel". After you are inside the biodome, make your way across the courtyard until you reach a small cutscene of bond spotting Graves on the balcony of a building. Make your way into the building and continue with your objective. You will reach a point where you are at a locked door and must hack a fusebox in order to open it. Use your Electromagnetic filter gadget to follow the wire into the next door room containing the fusebox. In this room go all the way to the bottom floor, you should see the floor has a section of glass which you can see through. You should also receive a prompt to use your camera. The camera prompt is exactly what this is for. You will have the option to take a picture of the crocodile below the glass. After taking the photo the trophy will pop.